js-yaml is a JavaScript YAML parser and dumper. From 3.0.0 before 3.15.0 and from 4.0.0 before 4.3.0, js-yaml can spend quadratic CPU time parsing a document whose size grows only linearly when a chain of mappings uses merge keys where each mapping merges the previous one. This issue is fixed in versions 3.15.0 and 4.3.0.
Metrics
Affected Vendors & Products
References
History
Wed, 15 Jul 2026 00:15:00 +0000
| Type | Values Removed | Values Added |
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| First Time appeared |
Redhat
Redhat hummingbird |
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| Weaknesses | CWE-606 | |
| CPEs | cpe:/a:redhat:hummingbird:1 | |
| Vendors & Products |
Redhat
Redhat hummingbird |
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| References |
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| Metrics |
threat_severity
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threat_severity
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Thu, 09 Jul 2026 16:30:00 +0000
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| Metrics |
ssvc
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Wed, 08 Jul 2026 17:00:00 +0000
| Type | Values Removed | Values Added |
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| First Time appeared |
Nodeca
Nodeca js-yaml |
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| Vendors & Products |
Nodeca
Nodeca js-yaml |
Wed, 08 Jul 2026 15:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | js-yaml is a JavaScript YAML parser and dumper. From 3.0.0 before 3.15.0 and from 4.0.0 before 4.3.0, js-yaml can spend quadratic CPU time parsing a document whose size grows only linearly when a chain of mappings uses merge keys where each mapping merges the previous one. This issue is fixed in versions 3.15.0 and 4.3.0. | |
| Title | js-yaml: YAML merge-key chains can force quadratic CPU consumption | |
| Weaknesses | CWE-407 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-07-08T15:15:54.675Z
Updated: 2026-07-09T15:14:29.753Z
Reserved: 2026-07-07T15:41:53.607Z
Link: CVE-2026-59869
Updated: 2026-07-09T15:14:24.071Z
No data.